Kangaroos teammate Aaron Woods had the same procedure back in 2013 with success while ex-NSW No.7 Trent Hodkinson and Roosters signing James Tedesco also used stem cell treatment to repair their knees.

It is a confidence boost for off contract Roosters leader Cordner who has been troubled by knee injuries the past two years.

Cordner is now expected to renew contract talks after strong interest from Newcastle and the Gold Coast.